slkvm is an application to provide some system tools to work with clustering and virtualization. It focuses on depending on as few external tools as possible but to also support as many virtualization technologies as possible. It works in a cluster environment where heartbeat runs virtual machines of nodes that have failed. It builds an "unheaded" cluster to avoid having a clear point of failure. It is able to build a two node cluster with everything redundant. It avoids compiling a new kernel or newer version of applications, so you can benefit from Debian security updates.

vert.x (formerly known as node.x) is a polyglot asynchronous application framework. It embraces the good bits of event-driven frameworks like node.js without the bad bits. Everything is non-blocking, runs on the JVM, and is polyglot. You can use it from Ruby, Groovy, Java, JavaScript, Python, Clojure, and Scala.

The goal of MinionJS is to provide easy-to-use, easy-to-learn classical inheritance for JavaScript. It enables you to easily namespace, create, and extend custom classes. MinionJS handles all the nitty-gritty so that you can focus on the important things.

nCombo allows developers to build fast, rich, data-driven applications based on Node.js. It uses HTTP for file delivery and the WebSocket protocol for data communication, and has an innovative architecture that allows you to call server-side functions from JavaScript on the client. Server-side functions can return multiple times at various intervals and thereby provide streams of data to clients. The use of a number of popular existing technologies minimizes the learning curve. It also includes the ability to embed JavaScript files in a tree-like structure and add custom middleware much like in other Node.js frameworks, session management, and global data management that lets you store data to share between all sessions/clients: the server can emit events and you can specify which clients will be notified using unique session IDs.

Sails.JS is a NodeJS MVC framework made with building API apps quickly in mind. It provides a RESTful JSON API, Websocket Support, ORM-based database connections, and support for many databases via adapters.

Skylable SX is a reliable, powerful, fully distributed cluster solution for your data storage needs. It can aggregate the disk space available on multiple servers and merge it into a single storage system. The cluster makes sure that your data is always replicated over multiple nodes (the exact number of copies is defined by the sysadmin) and synchronized. It has built-in support for deduplication, client-side encryption, on-the-fly compression, and much more.